Alright I Am Going To Tell Some Advice Nball if you look at the inside of the chain you shoud notice its like a side of a rod if you push the peice hard and spin it a little around it should pop right in. It Hurts Your Fingers Though :(

No because it uses a chain, but moves the bullets using a separate for of moving the chain. It uses an electrical motor to cycle the bullets, instead of the recoil, such as a gas-blowback.
An M249 SAW, (Squad Automatic Weapon) and the M60E4 are machine guns that use a chain, but are not chain guns.
It's a common misconception.
-PKT

It's a good gun, but i wish it would look better. it's not just you, its almost every machine gun i've seen out there. they look nothing like a machine gun, they are like big triangles! Great gun though. 4.5 stars because it's a machine gun!